Mastery Paths: Increase API Structure

As Mastery Paths become more popular and available for our institutions, there needs to be an increase in API structure for it. Currently, we can do anything to specific quizzes, pages, and module items through the API structure for those individual components, but there is no API structure to manage the flow of the Mastery Paths. Even something like unchecking/checking "Allow in Mastery Paths" would be helpful for our increased usage of Mastery Paths.

So, in a nutshell, we need more API structure to help manage, edit, and work with Mastery Paths.